Athletic trainers say wet-bulb globe temperature guides outdoor practice limits amid heat, lightning

An athletic trainer said trainers use the wet-bulb globe temperature to decide whether and how long student practices and band rehearsals can be held outdoors and whether protective equipment should be worn.

The wet-bulb globe temperature, the trainer said, “is trying to measure heat stress. So it takes into effect, like direct sunlight. So, like, ambient temperature, sun, if there's any cloud coverage, wind, humidity, and it throws all of that into an equation and it spits out the kind of like a feels like temperature. It's important because it helps us determine if it's safe to be outside for practices and games. So it does let us know, like, can we be outside if we can?”

That measurement, the trainer said, is taken during the last school period and…